Hoisting-tackle



' (No Model.)

S. VAUGLAIN.

HOISTING TAGKLEQ No. 381,043. Patented Apr. 10,. 1888. v

FIG/.1.

IH H

- jiwe/ni'or:

- Vwuczeu w SAMUEL llL VAUGLAIN, OF PHILADELPHIA, PENNsYLvANIA.

,HOIS TlNGI-TA'CKLE. I

SPECIFICATION forming part of Letters Patent No, 381,043; dated A rnia'lsaa. Application filed Dcccmber 12, 1887. Serial No. 257,653. (No model.) I t v my especial improvement being the provision 'of a ball or roller bearing between the head of the hook and its socket.

In'the accompanying drawings, Figure 1 is;

a side .view' of my improved hoisting block with the load suspended therefrom. Fig. 2 is sectional view, on a larger scale and partly in elevation, of sufticient of the hook and block to illustrate my invention; and Fig. 3 is a-plan View of the bearing for-the head of the hook, with the cover-plate removed.

Hoisting-tackle has heretofore been .made with universal swing and swiveling connections between the suspension-hook and the block carrying the same, the hook having a rounded head adapted to a rounded socket in the bearing-plate of the block. I have found by experience, however, that in a very short time the wear of the parts causes such a snug fit between the head of the block and its socket that it is impossible to turn the hook independently of the block either with a heavy or light load, the turning of the hook having the effect of twisting the hoisting-chains around each other, thus rendering it impossible to raise orlower the hook until the chain is untwisted. .This is especially annoying where it is desired to lift and adjust large and heavy artioles-such, for instance, as the flasks used of theshank'of the hook, the upper portion,

d, of this orifice being enlarged in cup shape, so as to present in section a segment of a cirole. I form in this cup-shaped portion d an in any direction.

The hook D has a head,

sphere and of 'about the same radius as the annular groove, 6, in which I place a numberof small spheres, f, which are free to revolve g, theunder side of which is in the. form of asegment of a sides of the cup d, thetop of the head 9 being j preferably rounded in order to increase the strength of the head.

I have found that construction I can not only dispense with the by tl1e, ahove-described whether with a heavy or light load, rotate ,or"

swing the hook with the greatest ease, so that where it formerlytook six mento turn and cross-bar B, and prevents dust and dirt from gaining access to the joint betweenthe head I of the hook and the cross-bar, the cap also jumping froinserviiig to preventthe hook from its bearings.

In some "cases I provide the cap witha set screw, 11, at the top, as shown by dotted lines in Fig. 2, so as to regulate the amount of ver H tioal play of the hook.

The upper ends of the sldeframes A, of the block carrya shaft for the chain-pulleys. 1

m m, as usual. .7

- I claim as my 1I1'VefltiOl1' 1. The combination, in arhoisting-block, of, p j a bearing having. a cup-shaped socket with a. groove therein, a series of spheres having. a bearing in'said groove, and a hook having a rounded headwhichrests upon thespheres and is free .to turn and to rock thereon, all substa'nf tially as described.

2. The combinatlonfof the'supportin'g-bar J 95;

and the swinging head swiveled thereon withv the cap E, secured to the/bar B, and occupying such a position in-respect to the head of g the hook as to prevent said head from jumping from its bearings, all substantially as de scribed.

to this specification in the presence of two subscribing witnesses. j I l Witnesses:

DAvIs H. HANSELL, CHAS. E. W LL,

s. M. vAUoL-AIN.

. I a Inc In testimony whereof ihave signed my name 1 65 useofoil on the hearing, but can at all times, 

